Malicious PDF — malware analysis report

Static analysis result for SHA-256 39b211098337b9d9…

MALICIOUS

PDF

43.2 KB Created: 2021-05-13 00:13:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 3ae1f0a08821813b89ab54018adb4a3b SHA-1: 2bcf360865f72cb002683ce2bc12acfc71e728c8 SHA-256: 39b211098337b9d96eb348f6f682604884bcf1c3ccf88d7be883f0e59d677cab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The primary link directs users to 'netcdn.xyz', which is flagged as a malicious redirector. The document body, though partially corrupted, contains references to game-related cheats and free items, reinforcing the lure. No scripts were extracted, but the presence of malicious links and the nature of the lure strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/coin-master-free-shield-link-game-hack In PDF document text
    • https://lesegais.ru/images/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://lesegais.ru/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://lesegais.ru/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ba1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA1 25792 bytes
SHA-256: e2bd5fccd88f0cd7f87d80de1a90b48d1b6f1190c5685ee273b47d1184e76e18
font_01_sfnt_off0000869a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869A 18296 bytes
SHA-256: bdd75fbf8ec71bc04a66a4301b6f3f2701d1869f9351b389c8a652d8f5cf828f

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